/*
 * Copyright (c) 2020 - present, Inspur Genersoft Co., Ltd.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.inspur.edp.bff.designtime.generator.core.rtgen.managergenerator.mgrImplclass.methodgenerators;


import com.inspur.edp.bff.api.dataprocessor.IFilterFieldConvertor;
import com.inspur.edp.bff.designtime.generator.core.rtgen.managergenerator.mgrImplclass.FSMgrImplGenContext;
import com.inspur.edp.caf.generator.baseInfo.ParameterInfo;
import com.inspur.edp.caf.generator.baseInfo.TypeInfo;
import com.inspur.edp.caf.generator.method.ClassMethodGenerator;
import com.inspur.edp.caf.generator.method.ClassMethodGeneratorContext;
import com.inspur.edp.caf.generator.utils.ExpressionUtils;
import lombok.var;
import org.eclipse.jdt.core.dom.Block;
import org.eclipse.jdt.core.dom.Modifier;

import java.util.ArrayList;
import java.util.Arrays;

public class GetFilterConvertorMethodGenerator extends ClassMethodGenerator {
    private FSMgrImplGenContext mgrImplGenContext;

    //protected internal virtual IFilterFieldConvertor GetFilterConvertor() => null;
    public GetFilterConvertorMethodGenerator(FSMgrImplGenContext mgrImplGenContext) {
        super();
        this.mgrImplGenContext = mgrImplGenContext;
    }

    @Override
    protected ClassMethodGeneratorContext createClassMethodInfoContext() {
        return new ClassMethodGeneratorContext();
    }

    @Override
    protected Block buildMethodBody() {
        return getMethodBody(getConvertorType());
    }

    private Block getMethodBody(TypeInfo convertorType) {
        var block = ast.newBlock();
        if (convertorType == null) {
            block.statements().add(ExpressionUtils.getReturnNullStatement(ast));
            return block;

        }

        var creation = ast.newClassInstanceCreation();
        creation.setType(convertorType.getType(ast, mgrImplGenContext.getMgrGenContext().getRootCompileUnitGenCtx()));

        var returnStatement = ast.newReturnStatement();
        returnStatement.setExpression(creation);
        block.statements().add(returnStatement);
        return block;
    }

    private TypeInfo getConvertorType() {
        return mgrImplGenContext.getMgrGenContext().getFSGeneratorContext().getVmGenContext().getFilterConvertorType();
    }

    @Override
    protected ArrayList<Modifier.ModifierKeyword> getAccessModifiers() {
        return new ArrayList<Modifier.ModifierKeyword>(Arrays.asList(
                new Modifier.ModifierKeyword[]{Modifier.ModifierKeyword.PROTECTED_KEYWORD}));
    }

    @Override
    protected boolean getIsOverride() {
        return true;
    }

    @Override
    protected String getMethodName() {
        return "getFilterConvertor";
    }

    @Override
    protected ArrayList<ParameterInfo> getParameterCollection() {
        return null;
    }

    @Override
    protected TypeInfo getReturnType() {
        return new TypeInfo(IFilterFieldConvertor.class);
    }
}
